[Back]

R. Hainisch, A. Kranzl, Y. Lin, MG Pandy, M. Gföhler:
"A generic musculoskeletal model of the juvenile lower limb for biomechanical analyses of gait";
Computer Methods in Biomechanics and Biomedical Engineering, 1 (2020).

The aim of this study was to develop a generic musculoskeletal model of a healthy 10-year-old
child and examine the effects of geometric scaling on the calculated values of lower-limb
muscle forces during gait. Subject-specific musculoskeletal models of five healthy children were
developed from in vivo MRI data, and these models were subsequently used to create a generic
juvenile (GJ) model. Calculations of lower-limb muscle forces for normal walking obtained from
two scaled-generic versions of the juvenile model (SGJ1 and SGJ2) were evaluated against corresponding
results derived from an MRI-based model of one subject (SSJ1). The SGJ1 and SGJ2
models were created by scaling the GJ model using gait marker positions and joint centre locations
derived from MRI imaging, respectively. Differences in the calculated values of peak isometric
muscle forces and muscle moment arms between the scaled-generic models and MRIbased
model were relatively small. Peak isometric muscle forces calculated for SGJ1 and SGJ2
were respectively 2.2% and 3.5% lower than those obtained for SSJ1. Model-predicted muscle
forces for SGJ2 agreed more closely with calculations obtained from SSJ1 than corresponding
results derived from SGJ1. These results suggest that accurate estimates of muscle forces during
gait may be obtained by scaling generic juvenile models based on joint centre locations. The
generic juvenile model developed in this study may be used as a template for creating subjectspecific
musculoskeletal models of normally-developing children in studies aimed at describing lower-limb muscle function during gait.

scaling; subject-specific model; muscle force optimization; muscle function

http://dx.doi.org/10.1080/10255842.2020.1817405

https://publik.tuwien.ac.at/files/publik_294927.pdf